Article (Scientific journals)
Mechanisms controlling the air-sea CO2 flux in the North Sea
Prowe, F. A. E.; Thomas, H.; Pätsch, J. et al.
2009In Continental Shelf Research, 29 (15), p. 1801-1808
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Abstract :
[en] The mechanisms driving the air–sea exchange of carbon dioxide (CO2) in the North Sea are investigated using the three-dimensional coupled physical–biogeochemical model ECOHAM (ECOlogical model, HAMburg). We validate our simulations using field data for the years 2001–2002 and identify the controls of the air–sea CO2 flux for two locations representative for the North Sea’s biogeochemical provinces. In the seasonally stratified northern region, net CO2 uptake is high (2:06molm 2 a 1) due to high net community production (NCP) in the surface water. Overflow production releasing semi labile dissolved organic carbon needs to be considered for a realistic simulation of the low dissolved inorganic carbon (DIC) concentrations observed during summer. This biologically driven carbon drawdown outcompetes the temperature-driven rise in CO2 partial pressure (pCO2) during the productive season. In contrast, the permanently mixed southern region is a weak net CO2 source (0:78molm 2 a 1). NCP is generally low except for the spring bloom because remineralization parallels primary production. Here, the pCO2 appears to be controlled by temperature.
Research center :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Prowe, F. A. E.
Thomas, H.
Pätsch, J.
Kühn
Bozec, Y.
Schiettecatte, L.-S.
Borges, Alberto  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique
de Baar, H. J. W.
Language :
English
Title :
Mechanisms controlling the air-sea CO2 flux in the North Sea
Publication date :
2009
Journal title :
Continental Shelf Research
ISSN :
0278-4343
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
Volume :
29
Issue :
15
Pages :
1801-1808
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 September 2009

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